莱斯信道中通用PSAM帧格式的优化设计

doi:10.12305/j.issn.1001-506X.2021.06.27

Abstract

Abstract:

Aiming at the carrier synchronization system with limited pilot frequency under Rician channel, the generalization and optimization design of the corresponding data frame format is studied, so as to improve the carrier synchronization ability significantly. Firstly, a generalized PSAM (G-PSAM) format is designed based on the standard pilot-symbol-assisted-modulation (S-PSAM) format, whose corresponding joint data-aided & non-data-aided Cramer-Rao bound (DA&NDA CRB) are derived and approximated. Then, an efficient solution to optimize the G-PSAM format is provided by means of the approximate DA&NDA CRB and the common control-variate method (CVM), resulting in a class of optimized G-PSAM (OG-PSAM) format and meanwhile comparing with the S-PSAM format. Simulation results show that the OG-PSAM format exhibits superior DA&NDA CRB performance to the S-PSAM format under the different pilot blocks for both the short-packet and long-packet transmissions.

Key words: wireless communications, optimized generalized pilot-symbol-assisted-modulation (PSAM) format, control-variate method, Cramer-Rao bound, Rician channel

CLC Number:

TN911.23

Xiaoying WANG, Zhongyang YU, Min ZHU, Baoming BAI, Wei LIU, Qilong RONG. Optimization design of generalized PSAM format over Rician channel[J]. Systems Engineering and Electronics, 2021, 43(6): 1679-1685.

Figures/Tables 5

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References 27

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参数	变量名称	参数	变量名称	参数	变量名称
f_d	载波频偏	α₀²	直射信号的功率	I_{1, i}	导频间隔
θ	相偏	σ²	散射信号的平均功率	κ_P	导频采样时刻集合
T_s	符号周期	K	莱斯因子	κ_D	数据采样时刻集合
N	一帧长度	L_P	导频序列长度	r_k	接收信号
s_k	调制信号	M_D	数据序列长度	F₁₁	费歇尔信息矩阵元素
n_k	复高斯随机变量	m	导频块数	F₂₂	费歇尔信息矩阵元素
L	散射路径数	L_i	第i个导频块长度	$ \frac{E_{s}}{N_{0}}$	信噪比
α_i	幅度系数	M_j	第j个数据块长度	η	导频开销

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Optimization design of generalized PSAM format over Rician channel

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